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Room for improvement? Detecting autosomal trisomies without serum screening
1North West Thames Regional Congenital Malformation Register, Kennedy Galton Centre, Northwick Park Hospital, Harrow, Middlesex.
Public Health
|September 1, 1993
Summary
Prenatal screening for autosomal trisomies using maternal age and ultrasound detected fewer Down syndrome cases compared to serum screening. However, this method was more effective for Edwards and Patau syndromes.
Area of Science:
- Prenatal diagnostics
- Genetics
- Public health
Background:
- Prenatal screening for autosomal trisomies is crucial for early detection and management.
- The North West Thames region previously relied on maternal age and ultrasound for screening.
Purpose of the Study:
- To evaluate the effectiveness of prenatal screening and diagnostic programs for common autosomal trisomies in the North West Thames region.
- To assess detection rates before the implementation of serum screening.
Main Methods:
- A retrospective study analyzed data from the North West Thames Regional Health Authority Congenital Malformation Register.
- Examined 235 pregnancies diagnosed with Down, Edwards, or Patau syndrome between 1990-1991.
Main Results:
- Prenatal diagnosis rates without serum screening were 33% for Down syndrome, 68% for Edwards syndrome, and 52% for Patau syndrome.
- Maternal age and ultrasound identified fewer Down syndrome cases compared to regions using serum screening.
Conclusions:
- Routine screening with maternal age and ultrasound is less effective for Down syndrome detection than serum screening.
- These methods show greater efficacy for antenatal detection of Edwards and Patau syndromes.
- The impact of serum screening on detecting these trisomies requires further investigation.